如何使用mocha.js测试纯JavaScript模块

Question

I'm trying to test simple frontend code. I just want to check with mocha that myModule is object and keys length greater then 0 .

Module definition:

var myModule = (function () {
    return {
        option: false
    };
})();

I'm trying to do so:

var expect = require('chai').expect;    
var myModule = require('<path_to_my_moule_file>');

describe("myModule", function() {
    it("is myModule object", function() {
        expect(myModule).to.be.a('object');//I know it's not enough
    });

    it("is myModule not empty", function() {
        expect(Object.keys(myModule)).to.have.length.greaterThan(0);
    });    
});

But of course this didn't work. Because my module isn't a nodejs module I thought, anyway myModule returns simple {} , but not a real value of it (I'm trying strings, etc, but it always {} ). How should I test this kind of code?

Update :

And what if i wouldn't use modules at all? Tested js file may be very simple:

var Config = {isDev: true};

Is it testable?

Thanks

Answer 1

You could add code like this at the end of your module:

if ( typeof module === 'object' && module.exports) {
    module.exports = myModule;
}

A typical browser environment does not have module defined in the global space, so this will export your module if you are running in Node.